Anyone who gardens, especially those in northern climates, likely dreams of extending their growing season with a greenhouse. The greenhouse has been used in various iterations since Ancient Rome.

Year-round crop production in cold climates requires structures that provide favorable growing conditions during cold winters and low light conditions.

Your compost pile is already a source of enriched soil and nutrients for your garden, but it can also be a source of free heat for your greenhouse as well. If you've ever turned your compost pile in ...